The Rabbis of the Gemara found themselves bothered by the superflous nature of the latter clause ("she had no child.") Seeking to undersatnd what it meant they comment:
The Rabbis explain, Sarah is unable to conceive a child because she does not have the anatomy to carry one. Yet, in the passages that follow, Sarah undergoes a sacred transformation marked by the changing of a name, as well as the newfound ability to conceive a child (Issac).
What is Sarah's sacred transformation? Can we see it in our world today?
Sarah and Abraham are characterized by their commitment to "welcoming the stranger" as they bring strangers into their tent and show them hospitality.
Do we show those undergoing sacred transformation in our sacred communities this same commitment to hospitality? How might we improve?